#include "game_types.h"

/* Short coroutine threader (2 args): single GetStackFrame round plus one
   FreeObject3 round. Threads a[] = {b, BE0 -> B98}, returns a. */
/* Object_InitTwo2 @ 0x08017284 (real 180B) -- short two-object init, returns a. Mirrors src/matched/Object_InitTwo2.c. */
extern int *Mem_GetStackFrame(void);
extern int *Mem_GetStackFrame_08015DC8(void);
extern int Collision_Resolve(int *a, int b);
extern void Mem_Swap(int *a, int *b);
extern void Mem_PopStack(void);
extern void Mem_PushStack(void);
extern void Mem_FreeObject3(int a, int b);

typedef struct {
    int link;
    int zero;
    int *self;
    int resume;
    int *sp;
} Frame;

int *Object_InitTwo2(int *a, int b)
{
    int *fr = Mem_GetStackFrame();
    Frame blk;
    a[1] = 0x02000BE0;
    a[0] = b;
    /* block 0, resumes at 0x080172D0 (self = sp variant) */
    blk.link = fr[1];
    blk.zero = 0;
    blk.self = (int *)&blk;
    blk.resume = 0x080172D0;
    blk.sp = (int *)&blk;
    fr[1] = (int)&blk;
    a[1] = 0x02000B98;
    fr[1] = *(int *)fr[1];
    /* block 1, resumes at 0x0801730C */
    blk.link = fr[1];
    blk.zero = 0;
    blk.self = (int *)&blk;
    blk.resume = 0x0801730C;
    blk.sp = (int *)&blk;
    fr[1] = (int)&blk + 24;
    Mem_FreeObject3((int)a, 0);
    fr[1] = *(int *)fr[1];
    Mem_PopStack();
    Mem_PushStack();
    return a;
}